I'm considering it for an application where we'd be controlling a light source, and it would make our jobs easier if the illumination were much higher, with equally higher currents in the device. I'm _assuming_ that it'll work fine and dandy at higher illuminations (and currents), at least until heating gets to be a problem.
Am I all wet? Are there reasons that this wouldn't stay reasonably linear at 10x or even 100x the illumination that it lists? What are the limits? Does the thing start to go into some sort of a current saturation mode? Does it start to look like a plain resistor at too high of a current, etc.?